Question detail
Which option best applies extension for Stretching and deformation in AQA GCSE Physics Forces?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Forces and elasticity
Question
- A. The point beyond which extension is no longer proportional to force — calculation focus for extension
- B. This confuses elastic and plastic deformation and does not answer Stretching and deformation.
- C. This is too vague because it does not use the force or motion quantity named in the objective.
- D. This reverses the physical cause and effect for Forces and elasticity.
Answer
The correct answer is: The point beyond which extension is no longer proportional to force — calculation focus for extension
Explanation
The correct option is The point beyond which extension is no longer proportional to force — calculation focus for extension. The point beyond which extension is no longer proportional to force — calculation focus for extension is correct because it matches the approved learning objective to identify the limit of proportionality on a force-extension graph. This answer belongs to Stretching and deformation within Forces and elasticity, so it must use precise AQA GCSE Physics forces and motion vocabulary. The other options are wrong because they either confuse elastic and plastic deformation, omit the required force or motion condition, or move away from the exact subtopic being tested.
Common mistake
Limit of Proportionality Confusion
Students often confuse the limit of proportionality with the elastic limit, thinking they are the same point on a force-extension graph.
Clarify that the limit of proportionality is where the extension stops being directly proportional to the force, while the elastic limit is where the material will not return to its original shape.
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